JP2006292262A - Fluidized bed dryer, and drying method of wet raw material by fluidized bed dryer - Google Patents

Fluidized bed dryer, and drying method of wet raw material by fluidized bed dryer Download PDF

Info

Publication number
JP2006292262A
JP2006292262A JP2005112598A JP2005112598A JP2006292262A JP 2006292262 A JP2006292262 A JP 2006292262A JP 2005112598 A JP2005112598 A JP 2005112598A JP 2005112598 A JP2005112598 A JP 2005112598A JP 2006292262 A JP2006292262 A JP 2006292262A
Authority
JP
Japan
Prior art keywords
gas
fluidized bed
raw material
wet raw
dispersion plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2005112598A
Other languages
Japanese (ja)
Other versions
JP4653545B2 (en
Inventor
Unai Kaneko
宇内 金子
Atsushi Fujikawa
淳 藤川
Kazutsugu Kishigami
和嗣 岸上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Engineering Co Ltd
Original Assignee
Nippon Steel Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP2005112598A priority Critical patent/JP4653545B2/en
Application filed by Nippon Steel Engineering Co Ltd filed Critical Nippon Steel Engineering Co Ltd
Priority to KR1020077025798A priority patent/KR100922258B1/en
Priority to RU2007141400/06A priority patent/RU2352879C1/en
Priority to CN2006800114468A priority patent/CN101156039B/en
Priority to PCT/JP2006/307131 priority patent/WO2006109626A1/en
Priority to BRPI0608616-0A priority patent/BRPI0608616A2/en
Priority to CN2009101262068A priority patent/CN101556104B/en
Priority to UAA200712400A priority patent/UA86318C2/en
Priority to TW095112440A priority patent/TW200643357A/en
Publication of JP2006292262A publication Critical patent/JP2006292262A/en
Application granted granted Critical
Publication of JP4653545B2 publication Critical patent/JP4653545B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
    • F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
    • C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
    • C10B57/10—Drying
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/12—Velocity of flow; Quantity of flow, e.g. by varying fan speed, by modifying cross flow area
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/001—Handling, e.g. loading or unloading arrangements
    • F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B15/00—Fluidised-bed furnaces; Other furnaces using or treating finely-divided materials in dispersion
    • F27B15/02—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B15/08—Arrangements of devices for charging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B15/00—Fluidised-bed furnaces; Other furnaces using or treating finely-divided materials in dispersion
    • F27B15/02—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B15/10—Arrangements of air or gas supply devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Microbiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Drying Of Solid Materials (AREA)
  • Coke Industry (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Furnace Charging Or Discharging (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To prevent clogging of a gas distribution plate of a fluidized bed dryer with a wet raw material put through a charging shoot. <P>SOLUTION: In this fluidized dryer 3 adapted to charge the wet raw material through the charging shoot 8, browing high-temperature gas as a heat source-and-fluidizing gas from the lower side of the gas distribution plate 5 and forming a fluidized layer 9 on the gas distribution plate 5 to dry the wet raw material, a gas blow-in nozzle 13 is provided between a lower portion of the charging shoot 8 and the fluidized layer 9, and the gas is blown through the gas blow-in nozzle 13 to disperse the flow velocity of the wet raw material falling from the shoot 8. Otherwise, the flow velocity of the hot source-and-fluidizing gas to be blown from the lower side of the gas distribution plate 5 just under the shoot 8 is set higher than the flow velocity of the heat source-and-fluidizing gas to be blown from the lower side of the gas distribution plate 5 except just under the shoot 8. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、コークス炉に装入する石炭等の湿潤原料を乾燥する流動層乾燥機、及びこの流動層乾燥機による湿潤粉体の乾燥方法に関する。   The present invention relates to a fluidized bed dryer for drying a wet raw material such as coal charged in a coke oven, and a method for drying wet powder using the fluidized bed dryer.

コークス生産に際し、コークスの品質向上及びコークス炉での生産性向上を目的として、コークス炉装入前に装入石炭を乾燥することが行われている。コークス炉用石炭の含有水分は乾燥前で通常９〜１３％程度であるが、この石炭を石炭乾燥機で水分５〜６％に乾燥する。   In coke production, for the purpose of improving the quality of coke and improving the productivity in the coke oven, the charging coal is dried before charging the coke oven. The water content of the coke oven coal is usually about 9 to 13% before drying, but this coal is dried to 5 to 6% with a coal dryer.

石炭の乾燥に流動層乾燥機を用いることは従来より知られており、この流動層乾燥機では、湿潤原料を装入シュートからガス分散板上に装入するとともに、ガス分散板下側から熱源兼流動化ガスを吹き込んでガス分散板上に流動層を形成し、この流動層で湿潤原料を乾燥する（例えば特許文献１参照）。   It has been conventionally known to use a fluidized bed dryer for drying coal. In this fluidized bed dryer, a wet raw material is charged onto a gas dispersion plate from a charging chute and a heat source is provided from the lower side of the gas dispersion plate. The fluidizing gas is blown to form a fluidized bed on the gas dispersion plate, and the wet raw material is dried in the fluidized bed (see, for example, Patent Document 1).

しかし、このような従来の流動層乾燥機では、装入する湿潤原料が落下による速度を持ったまま装入シュート直下部のガス分散板上の流動層内に投入されるので、装入シュート直下部においてガス分散板の細孔内に投入直後の湿潤原料が詰まり、流動状態の不良による乾燥不全の原因となっていた。また、詰まったガス分散板の細孔については、流動層乾燥機の停止修繕時に一つ一つ詰まりを叩き出して解消する必要があり、多大な時間と労力がかかっていた。
特許第２９３８０２９号公報 However, in such a conventional fluidized bed dryer, the wet raw material to be charged is introduced into the fluidized bed on the gas dispersion plate immediately below the charging chute with the speed of dropping, so In the part, the wet raw material immediately after being put in the pores of the gas dispersion plate was clogged, which caused dry failure due to poor fluidity. Further, the pores of the clogged gas dispersion plate need to be eliminated by knocking out clogs one by one when stopping and repairing the fluidized bed dryer, which takes a lot of time and labor.
Japanese Patent No. 2938029

本発明が解決しようとする課題は、流動層乾燥機のガス分散板に装入シュートから投入される湿潤原料による目詰まりが生じることを防止することにある。   The problem to be solved by the present invention is to prevent clogging due to wet raw material introduced from a charging chute into a gas dispersion plate of a fluidized bed dryer.

本発明は、装入シュートから落下する湿潤原料の流束を分散させること、又は、装入シュート直下部のガス分散板下側から吹き込む熱源兼流動化ガスの流速を上げることによって上記課題を解決するものである。   The present invention solves the above problems by dispersing the flux of wet raw material falling from the charging chute or by increasing the flow rate of the heat source / fluidizing gas blown from the lower side of the gas dispersion plate immediately below the charging chute. To do.

すなわち、本発明の第１の態様は、湿潤原料を装入シュートから装入し、高温ガスを熱源兼流動化ガスとしてガス分散板下側から吹き込み、ガス分散板上に流動層を形成して湿潤原料を乾燥する流動層乾燥機によって湿潤原料を乾燥するにあたり、装入シュート下部と流動層との間の外壁部に設けたガス吹き込みノズルからガスを吹き込み、装入シュートから落下する湿潤原料の流束を分散させることを特徴とする。   That is, according to the first aspect of the present invention, a wet raw material is charged from a charging chute, high-temperature gas is blown from the lower side of the gas dispersion plate as a heat source and fluidizing gas, and a fluidized bed is formed on the gas dispersion plate. When the wet raw material is dried by the fluidized bed dryer for drying the wet raw material, gas is blown from the gas blowing nozzle provided on the outer wall portion between the lower portion of the charging chute and the fluidized bed, and the wet raw material falling from the charging chute It is characterized by dispersing the flux.

この第１の態様において、ガス吹き込みノズルから吹き込むガスとしては、前記高温ガスの一部を使用することができる。   In the first aspect, a part of the high temperature gas can be used as the gas blown from the gas blowing nozzle.

本発明の第２の態様は、湿潤原料を装入シュートから装入し、高温ガスを熱源兼流動化ガスとしてガス分散板下側から吹き込み、ガス分散板上に流動層を形成して湿潤原料を乾燥する流動層乾燥機によって湿潤原料を乾燥するにあたり、装入シュート直下部のガス分散板下側から吹き込む熱源兼流動化ガスの流速を、装入シュート直下部以外のガス分散板下側から吹き込む熱源兼流動化ガスの流速よりも速くすることを特徴とする。   According to a second aspect of the present invention, a wet raw material is charged from a charging chute, hot gas is blown from the lower side of the gas dispersion plate as a heat source and fluidizing gas, and a fluidized bed is formed on the gas dispersion plate to form a wet raw material. When the wet raw material is dried by a fluidized bed dryer, the flow rate of the heat source and fluidizing gas blown from the lower side of the gas dispersion plate immediately below the charging chute is changed from the lower side of the gas distribution plate other than the lower portion of the charging chute. It is characterized by being faster than the flow rate of the heat source and fluidizing gas to be blown.

本発明によれば、装入シュートから落下する湿潤原料の流束を分散させるので、装入シュートから落下する湿潤原料が装入シュート直下部等の特定箇所に集中的に落下することがなくなり、ガス分散板の目詰まりを防止することができる。   According to the present invention, since the flux of wet raw material falling from the charging chute is dispersed, the wet raw material falling from the charging chute does not fall intensively at a specific location such as directly below the charging chute, Clogging of the gas dispersion plate can be prevented.

また、本発明によれば、装入シュート直下部のガス分散板下側から吹き込む熱源兼流動化ガスの流速を上げるので、目詰まりが生じやすい装入シュート直下部のガス分散板に目詰まりが生じにくくなり、ガス分散板の目詰まりを防止することができる。   Further, according to the present invention, the flow rate of the heat source / fluidizing gas blown from the lower side of the gas dispersion plate immediately below the charging chute is increased, so that the gas distribution plate immediately below the charging chute is easily clogged. It becomes difficult to occur and clogging of the gas dispersion plate can be prevented.

以下、本発明をコークス炉用石炭粉（以下単に「石炭粉」という。）の乾燥に適用した実施例に基づき、本発明の実施の形態を説明する。   Hereinafter, embodiments of the present invention will be described based on examples in which the present invention is applied to drying of coal powder for coke ovens (hereinafter simply referred to as “coal powder”).

図１は、本発明の流動層乾燥機の第１実施例を示し、（ａ）はその縦断面図、（ｂ）は（ａ）のＡ−Ａ線矢視図である。   1A and 1B show a first embodiment of a fluidized bed dryer according to the present invention, in which FIG. 1A is a longitudinal sectional view thereof, and FIG.

図１において、コークス炉（図示せず）で発生した温度１５０〜２５０℃程度の燃焼排ガス（以下「高温ガス」という。）は、ブロワー１によって昇圧され、熱源兼流動化気体としてガス本管２を通って流動層乾燥機３の下部の風箱４ａ、４ｂ内に導入される。風箱４ａ、４ｂ内に導入された高温ガスは、風箱４ａ、４ｂの上部に設けたガス分散板５を通過して上昇し、ガス出口６から排出される。流動層乾燥機３内は、仕切壁７によって２つの乾燥室３ａ、３ｂに仕切られており、それぞれの乾燥室の下側に風箱４ａ、４ｂが配置されている。   In FIG. 1, combustion exhaust gas (hereinafter referred to as “hot gas”) having a temperature of about 150 to 250 ° C. generated in a coke oven (not shown) is boosted by a blower 1 and used as a heat source and fluidizing gas. And is introduced into the wind boxes 4a and 4b below the fluidized bed dryer 3. The high-temperature gas introduced into the wind boxes 4a and 4b rises through the gas dispersion plate 5 provided on the top of the wind boxes 4a and 4b, and is discharged from the gas outlet 6. The inside of the fluidized bed dryer 3 is divided into two drying chambers 3a and 3b by a partition wall 7, and wind boxes 4a and 4b are arranged below the respective drying chambers.

湿潤原料である石炭粉は、装入シュート８によって流動層乾燥機３内に装入され、ガス分散板５を通過する高温ガスによる上昇流によってガス分散板５上に流動層９を形成する。この流動層９において石炭粉の乾燥を行い、石炭粉は所定の温度及び含水率に調整されて排出シュート１０によって排出される。   Coal powder, which is a wet raw material, is charged into the fluidized bed dryer 3 by the charging chute 8 and forms a fluidized bed 9 on the gas dispersion plate 5 by the upward flow of the high temperature gas passing through the gas dispersion plate 5. The coal powder is dried in the fluidized bed 9, and the coal powder is adjusted to a predetermined temperature and moisture content and is discharged by the discharge chute 10.

ガス本管２からは第１バイパス管１１が分岐しており、この第１バイパス管１１を介して高温ガスの一部が流動層乾燥機３上部のガス出口６近傍に導入される。第１バイパス管１１により導入される高温ガスは、ガス出口６近傍及びその下流側での結露の発生を防止するためのものである。   A first bypass pipe 11 branches from the gas main pipe 2, and a part of the high temperature gas is introduced into the vicinity of the gas outlet 6 at the upper part of the fluidized bed dryer 3 through the first bypass pipe 11. The hot gas introduced by the first bypass pipe 11 is for preventing the occurrence of condensation near the gas outlet 6 and downstream thereof.

さらに、第１バイパス管１１からは第２バイパス管１２が分岐しており、この第２バイパス管１２を介して高温ガスの一部がガス吹き込みノズル１３に導入される。ガス吹き込みノズル１３は、装入シュート８下部と流動層９上面との間の外壁部３ｃに設けられており、このガス吹き込みノズル１３から高温ガスの一部が流動層乾燥機３内に吹き込まれる。なお、第２バイパス管１２はガス本管２から分岐することもできる。   Further, a second bypass pipe 12 branches from the first bypass pipe 11, and a part of the high temperature gas is introduced into the gas blowing nozzle 13 through the second bypass pipe 12. The gas blowing nozzle 13 is provided on the outer wall 3 c between the lower portion of the charging chute 8 and the upper surface of the fluidized bed 9, and a part of the high temperature gas is blown into the fluidized bed dryer 3 from the gas blowing nozzle 13. . The second bypass pipe 12 can also be branched from the gas main pipe 2.

図２には、ガス吹き込みノズル１３による高温ガスの吹き込み状況を模式的に示す。同図に示すように、ガス吹き込みノズル１３から吹き出す高温ガスによって石炭粉（湿潤原料）の流束が分散し、装入シュート８から落下する石炭粉が装入シュート８直下部に集中的に落下することがなくなる。これによって、装入シュート８直下部のガス分散板５が石炭粉によって目詰まりすることを防止できる。   FIG. 2 schematically shows the hot gas blowing state by the gas blowing nozzle 13. As shown in the figure, the flux of coal powder (wet raw material) is dispersed by the high-temperature gas blown out from the gas blowing nozzle 13, and the coal powder falling from the charging chute 8 intensively falls directly below the charging chute 8. There is no longer to do. Thereby, it is possible to prevent the gas dispersion plate 5 immediately below the charging chute 8 from being clogged with coal powder.

図３には、ガス吹き込みノズル１３の構成例を示す。ガス吹き込みノズル１３からの高温ガスの吹き込みによる石炭粉の流束の分散を効果的にするためには、図３（ａ）に示すように、先端が拡がったガス吹き込みノズル１３を使用することもできる。また、図３（ｂ）に示すように、吹き出し方向の異なる複数のガス吹き込みノズル１３を設置することでも同様の効果が得られる。   In FIG. 3, the structural example of the gas blowing nozzle 13 is shown. In order to effectively disperse the flux of coal powder due to the hot gas blowing from the gas blowing nozzle 13, as shown in FIG. 3 (a), it is also possible to use the gas blowing nozzle 13 having an extended tip. it can. Further, as shown in FIG. 3B, the same effect can be obtained by installing a plurality of gas blowing nozzles 13 having different blowing directions.

図４は、ガス吹き込みノズル１３の好ましい配置例を説明する図であり、（ａ）はその横断面図、（ｂ）は縦断面図である。   4A and 4B are diagrams for explaining a preferred arrangement example of the gas blowing nozzles 13, wherein FIG. 4A is a transverse sectional view and FIG. 4B is a longitudinal sectional view.

ガス吹き込みノズル１３から吹き込む高温ガスは、落下してくる石炭粉を流動層乾燥機３の排出シュート側に吹き飛ばすことで石炭粉の流束を分散するが、この際、吹き飛ばされる石炭粉が流動層乾燥機３内の仕切壁７に衝突して摩耗を起こすことを防ぐため、ガス吹き込みノズル１３下端から流動層９上面までの高さＨと、ガス吹き込みノズル１３から仕切壁７までの水平距離Ｌと、ガス吹き込みノズル１３の垂直方向角度θｖ、水平方向角度θｈは、下記（１）式の関係を満たすように設定することが好ましい。
ｔａｎθｖ ＞ Ｈ／（Ｌ／ｃｏｓθｈ） …（１） The hot gas blown from the gas blowing nozzle 13 disperses the flux of the coal powder by blowing the falling coal powder to the discharge chute side of the fluidized bed dryer 3. The height H from the lower end of the gas blowing nozzle 13 to the upper surface of the fluidized bed 9 and the horizontal distance L from the gas blowing nozzle 13 to the partition wall 7 are prevented in order to prevent wear due to collision with the partition wall 7 in the dryer 3. The vertical angle θv and the horizontal angle θh of the gas blowing nozzle 13 are preferably set so as to satisfy the relationship of the following expression (1).
tan θv> H / (L / cos θh) (1)

なお、流動層乾燥機が１つの乾燥室のみを有し仕切壁がない場合は、上記（１）式において、Ｌをガス吹き込みノズル１３から流動層乾燥機の排出シュート側の内壁までの水平距離として計算する。   When the fluidized bed dryer has only one drying chamber and no partition wall, the horizontal distance from the gas blowing nozzle 13 to the inner wall on the discharge chute side of the fluidized bed dryer in the above formula (1). Calculate as

図５は、本発明の流動層乾燥機の第２実施例を示し、（ａ）はその縦断面図、（ｂ）は（ａ）のＡ−Ａ線矢視図、（ｃ）、（ｄ）は（ａ）のＢ−Ｂ線矢視図である。   5A and 5B show a second embodiment of the fluidized bed dryer of the present invention, in which FIG. ) Is a BB line arrow view of (a).

図５において、コークス炉（図示せず）で発生した温度１５０〜２５０℃程度の燃焼排ガス（以下「高温ガス」という。）は、ブロワー１によって昇圧され、熱源兼流動化気体としてガス本管２及び後述する第２バイパス管１２を通って流動層乾燥機３の下部の風箱４ａ、４ｂ内に導入される。風箱４ａ、４ｂ内に導入された高温ガスは、風箱４ａ、４ｂの上部に設けたガス分散板５を通過して上昇し、ガス出口６から排出される。流動層乾燥機３内は、仕切壁７によって２つの乾燥室３ａ、３ｂに仕切られており、それぞれの乾燥室の下側に風箱４ａ、４ｂが配置されている。また、前段側の風箱４ａにおいては、装入シュート８直下部の領域が仕切板１４によってそれ以外の領域から隔離されている。具体的には、図５（ｃ）又は図５（ｄ）に示すように仕切板１４を配置し、装入シュート８直下部の領域をそれ以外の領域から隔離する。   In FIG. 5, combustion exhaust gas (hereinafter referred to as “hot gas”) having a temperature of about 150 to 250 ° C. generated in a coke oven (not shown) is boosted by a blower 1 and used as a heat source and fluidizing gas. And it introduce | transduces in the wind boxes 4a and 4b of the lower part of the fluidized bed dryer 3 through the 2nd bypass pipe 12 mentioned later. The high-temperature gas introduced into the wind boxes 4a and 4b rises through the gas dispersion plate 5 provided on the top of the wind boxes 4a and 4b, and is discharged from the gas outlet 6. The inside of the fluidized bed dryer 3 is divided into two drying chambers 3a and 3b by a partition wall 7, and wind boxes 4a and 4b are arranged below the respective drying chambers. Further, in the wind box 4 a on the front stage side, the region immediately below the charging chute 8 is isolated from the other regions by the partition plate 14. Specifically, as shown in FIG. 5 (c) or FIG. 5 (d), the partition plate 14 is arranged to isolate the region immediately below the charging chute 8 from other regions.

湿潤原料である石炭粉は、装入シュート８によって流動層乾燥機３内に装入され、ガス分散板５を通過する高温ガスによる上昇流によってガス分散板５上に流動層９を形成する。この流動層９において石炭粉の乾燥を行い、石炭粉は所定の温度及び含水率に調整されて排出シュート１０によって排出される。   Coal powder, which is a wet raw material, is charged into the fluidized bed dryer 3 by the charging chute 8 and forms a fluidized bed 9 on the gas dispersion plate 5 by the upward flow of the high temperature gas passing through the gas dispersion plate 5. The coal powder is dried in the fluidized bed 9, and the coal powder is adjusted to a predetermined temperature and moisture content and is discharged by the discharge chute 10.

ガス本管２からは第１バイパス管１１が分岐しており、この第１バイパス管１１を介して高温ガスの一部が流動層乾燥機３上部のガス出口６近傍に導入される。第１バイパス管１１により導入される高温ガスは、ガス出口６近傍及びその下流側での結露の発生を防止するためのものである。   A first bypass pipe 11 branches from the gas main pipe 2, and a part of the high temperature gas is introduced into the vicinity of the gas outlet 6 at the upper part of the fluidized bed dryer 3 through the first bypass pipe 11. The hot gas introduced by the first bypass pipe 11 is for preventing the occurrence of condensation near the gas outlet 6 and downstream thereof.

また、ガス本管２からは第２バイパス管１２が分岐しており、上述した仕切板１４によって隔離された風箱４ａの装入シュート８直下部の領域には、第２バイパス管１２によって高温ガスが導入され、それ以外の領域にはガス本管２によって高温ガスが導入される。第２バイパス管１２には流量調節弁１５が設けられ、ガス本管２にも第２バイパス管１２の分岐点より下流側に流量調節弁１６が設けられている。   Further, the second bypass pipe 12 branches from the gas main pipe 2, and the region immediately below the charging chute 8 of the wind box 4 a isolated by the partition plate 14 is heated by the second bypass pipe 12. Gas is introduced, and hot gas is introduced into the other region by the gas main pipe 2. The second bypass pipe 12 is provided with a flow control valve 15, and the gas main pipe 2 is also provided with a flow control valve 16 on the downstream side of the branch point of the second bypass pipe 12.

以上の構成において、本実施例では、第２バイパス管１２及びガス本管２に設けた流量調節弁１５、１６を調節し、装入シュート８直下部のガス分散板５下側から吹き込む熱源兼流動化ガスの流速が、装入シュート直下部以外のガス分散板下側から吹き込む熱源兼流動化ガスの流速よりも速くなるようにする。これによって、目詰まりが生じやすい装入シュート８直下部のガス分散板５に目詰まりが生じにくくなり、ガス分散板５の目詰まりを防止することができる。   In the above configuration, in this embodiment, the flow rate control valves 15 and 16 provided in the second bypass pipe 12 and the gas main pipe 2 are adjusted, and the heat source is also blown from the lower side of the gas dispersion plate 5 immediately below the charging chute 8. The flow rate of the fluidizing gas is set to be faster than the flow rate of the heat source / fluidizing gas blown from the lower side of the gas dispersion plate other than directly below the charging chute. As a result, clogging is less likely to occur in the gas dispersion plate 5 immediately below the charging chute 8 where clogging is likely to occur, and clogging of the gas dispersion plate 5 can be prevented.

上記実施例では、第２バイパス管１２及びガス本管２の高温ガス流量を調節することで、装入シュート８直下部のガス分散板５下側から吹き込む熱源兼流動化ガスの流速を上げるようにしたが、第２バイパス管１２及びガス本管２の配管径を調整したり、第２バイパス管１２にガス加圧装置を設けたりすることによっても同様の目的を達成することができる。   In the above embodiment, the flow rate of the heat source / fluidizing gas blown from the lower side of the gas dispersion plate 5 immediately below the charging chute 8 is increased by adjusting the high temperature gas flow rates of the second bypass pipe 12 and the gas main pipe 2. However, the same object can be achieved by adjusting the pipe diameters of the second bypass pipe 12 and the gas main pipe 2 or by providing a gas pressurizing device in the second bypass pipe 12.

また上記実施例では、ガス本管２から分岐した第２バイパス管１２により風箱４ａの装入シュート８直下部の領域に高温ガスを導入するようにしたが、別途に独立のガス配管を設けても良い。   In the above embodiment, the high temperature gas is introduced into the region immediately below the charging chute 8 of the wind box 4a by the second bypass pipe 12 branched from the gas main pipe 2, but an independent gas pipe is provided separately. May be.

本発明は、コークス炉に投入する石炭粉の乾燥のみならず、水砕スラグや石灰石など、他の湿潤原料の乾燥にも適用できる。また、流動層乾燥機の熱源兼流動化ガスとして使用する高温ガスも、コークス炉の燃焼排ガスに限らず、燃焼炉やキルンなどからの排ガスを使用することもできる。   The present invention can be applied not only to drying coal powder to be fed into a coke oven, but also to drying other wet raw materials such as granulated slag and limestone. Further, the high-temperature gas used as the heat source and fluidizing gas of the fluidized bed dryer is not limited to the combustion exhaust gas from the coke oven, but exhaust gas from a combustion furnace or kiln can also be used.

本発明の流動層乾燥機の第１実施例を示し、（ａ）はその縦断面図、（ｂ）は（ａ）のＡ−Ａ線矢視図である。The 1st Example of the fluidized bed dryer of this invention is shown, (a) is the longitudinal cross-sectional view, (b) is the AA arrow line view of (a). ガス吹き込みノズルによる高温ガスの吹き込み状況を模式的に示す。A high temperature gas blowing state by a gas blowing nozzle is schematically shown. ガス吹き込みノズルの構成例を示す。The structural example of a gas blowing nozzle is shown. ガス吹き込みノズルの好ましい配置例を説明する図であり、（ａ）はその横断面図、（ｂ）は縦断面図である。It is a figure explaining the example of preferable arrangement | positioning of a gas blowing nozzle, (a) is the cross-sectional view, (b) is a longitudinal cross-sectional view. 本発明の流動層乾燥機の第２実施例を示し、（ａ）はその縦断面図、（ｂ）は（ａ）のＡ−Ａ線矢視図、（ｃ）、（ｄ）は（ａ）のＢ−Ｂ線矢視図である。The 2nd Example of the fluidized bed dryer of this invention is shown, (a) is the longitudinal cross-sectional view, (b) is the AA arrow line view of (a), (c), (d) is (a) It is a BB line arrow directional view.

符号の説明Explanation of symbols

１ ブロワー
２ ガス本管
３ 流動層乾燥機
３ａ 第１乾燥室
３ｂ 第２乾燥室
４ａ、４ｂ 風箱
５ ガス分散板
６ ガス出口
７ 仕切壁
８ 装入シュート
９ 流動層
１０ 排出シュート
１１ 第１バイパス管
１２ 第２バイパス管
１３ ガス吹き込みノズル
１４ 仕切板
１５、１６ 流量調節弁 1 Blower 2 Gas Main 3 Fluidized Bed Dryer 3a First Drying Chamber 3b Second Drying Chamber 4a, 4b Air Box 5 Gas Dispersion Plate 6 Gas Outlet 7 Partition Wall 8 Charge Chute 9 Fluidized Bed 10 Discharge Chute 11 First Bypass Pipe 12 Second bypass pipe 13 Gas injection nozzle 14 Partition plate 15, 16 Flow rate control valve

Claims (6)

湿潤原料を装入シュートから装入し、高温ガスを熱源兼流動化ガスとしてガス分散板下側から吹き込み、ガス分散板上に流動層を形成して湿潤原料を乾燥する流動層乾燥機による湿潤原料の乾燥方法において、
装入シュート下部と流動層との間の外壁部からガスを吹き込み、装入シュートから落下する湿潤原料の流束を分散させることを特徴とする流動層乾燥機による湿潤原料の乾燥方法。 Wetting with a fluidized bed dryer that charges wet raw material from the charging chute, blows hot gas from the lower side of the gas dispersion plate as a heat source and fluidizing gas, forms a fluidized bed on the gas dispersion plate, and dries the wet raw material In the method of drying raw materials,
A wet raw material drying method using a fluidized bed dryer, wherein gas is blown from an outer wall portion between a lower portion of a charging chute and a fluidized bed, and a flux of the wet raw material falling from the charging chute is dispersed. ガス吹き込みノズルから吹き込むガスとして、前記高温ガスの一部を使用する請求項１に記載の流動層乾燥機による湿潤原料の乾燥方法。   The method for drying a wet raw material by a fluidized bed dryer according to claim 1, wherein a part of the high temperature gas is used as a gas blown from a gas blowing nozzle. 湿潤原料を装入シュートから装入し、高温ガスを熱源兼流動化ガスとしてガス分散板下側から吹き込み、ガス分散板上に流動層を形成して湿潤原料を乾燥する流動層乾燥機による湿潤原料の乾燥方法において、
装入シュート直下部のガス分散板下側から吹き込む熱源兼流動化ガスの流速を、装入シュート直下部以外のガス分散板下側から吹き込む熱源兼流動化ガスの流速よりも速くすることを特徴とする流動層乾燥機による湿潤原料の乾燥方法。 Wetting with a fluidized bed dryer that charges wet raw material from the charging chute, blows hot gas from the lower side of the gas dispersion plate as a heat source and fluidizing gas, forms a fluidized bed on the gas dispersion plate, and dries the wet raw material In the method of drying raw materials,
The flow rate of the heat source / fluidized gas blown from the lower side of the gas dispersion plate just below the charging chute is made faster than the flow rate of the heat source / fluidized gas blown from the lower side of the gas dispersion plate other than directly below the charging chute. A method for drying a wet raw material using a fluidized bed dryer. 湿潤原料を装入シュートから装入し、高温ガスを熱源兼流動化ガスとしてガス分散板下側から吹き込み、ガス分散板上に流動層を形成して湿潤原料を乾燥する流動層乾燥機において、
装入シュート下部と流動層との間の外壁部にガス吹き込みノズルを設け、このガス吹き込みノズルからガスを吹き込み、装入シュートから落下する湿潤原料の流束を分散させることを特徴とする流動層乾燥機。 In a fluidized bed dryer that charges a wet raw material from a charging chute, blows a high temperature gas as a heat source and fluidizing gas from the lower side of the gas dispersion plate, forms a fluidized bed on the gas dispersion plate, and dries the wet raw material.
A fluidized bed characterized in that a gas blowing nozzle is provided on the outer wall portion between the lower portion of the charging chute and the fluidized bed, gas is blown from the gas blowing nozzle, and the flux of the wet raw material falling from the charging chute is dispersed. Dryer. ガス吹き込みノズルから吹き込むガスとして前記高温ガスの一部をガス吹き込みノズルに導入するガス配管を設けた請求項１に記載の流動層乾燥機。   The fluidized bed dryer according to claim 1, further comprising a gas pipe for introducing a part of the high-temperature gas into the gas blowing nozzle as a gas blown from the gas blowing nozzle. 湿潤原料を装入シュートから装入し、高温ガスを熱源兼流動化ガスとしてガス分散板下側から吹き込み、ガス分散板上に流動層を形成して湿潤原料を乾燥する流動層乾燥機において、
装入シュート直下部のガス分散板下側から吹き込む熱源兼流動化ガスの流速を、装入シュート直下部以外のガス分散板下側から吹き込む熱源兼流動化ガスの流速よりも速くすることを特徴とする流動層乾燥機。 In a fluidized bed dryer that charges a wet raw material from a charging chute, blows a high temperature gas as a heat source and fluidizing gas from the lower side of the gas dispersion plate, forms a fluidized bed on the gas dispersion plate, and dries the wet raw material.
The flow rate of the heat source / fluidized gas blown from the lower side of the gas dispersion plate just below the charging chute is made faster than the flow rate of the heat source / fluidized gas blown from the lower side of the gas dispersion plate other than directly below the charging chute. Fluidized bed dryer.
JP2005112598A 2005-04-08 2005-04-08 Fluidized bed dryer and method for drying wet raw material by fluidized bed dryer Active JP4653545B2 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
JP2005112598A JP4653545B2 (en) 2005-04-08 2005-04-08 Fluidized bed dryer and method for drying wet raw material by fluidized bed dryer
RU2007141400/06A RU2352879C1 (en) 2005-04-08 2006-04-04 Fluidised bed drier and drying method of wet raw material using fluidised bed drier
CN2006800114468A CN101156039B (en) 2005-04-08 2006-04-04 Fluidized-bed dryer and method of drying wet material by means of the same
PCT/JP2006/307131 WO2006109626A1 (en) 2005-04-08 2006-04-04 Fluidized-bed dryer and method of drying wet material by means of the same
KR1020077025798A KR100922258B1 (en) 2005-04-08 2006-04-04 Fluidized-bed dryer and method of drying wet material by means of the same
BRPI0608616-0A BRPI0608616A2 (en) 2005-04-08 2006-04-04 fluid bed dryer and wet material drying method using fluid bed dryer
CN2009101262068A CN101556104B (en) 2005-04-08 2006-04-04 Fluidized-bed dryer and method of drying wet material by means of the same
UAA200712400A UA86318C2 (en) 2005-04-08 2006-04-04 Fluidized-bed dryer (variants) and method for drying wet raw material with use of dryer with fluidized bed (variants)
TW095112440A TW200643357A (en) 2005-04-08 2006-04-07 Fluidized bed dryer, and drying method of wet raw material by fluidized bed dryer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005112598A JP4653545B2 (en) 2005-04-08 2005-04-08 Fluidized bed dryer and method for drying wet raw material by fluidized bed dryer

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP2010238637A Division JP5081288B2 (en) 2010-10-25 2010-10-25 Fluidized bed dryer and method for drying wet raw material by fluidized bed dryer

Publications (2)

Publication Number Publication Date
JP2006292262A true JP2006292262A (en) 2006-10-26
JP4653545B2 JP4653545B2 (en) 2011-03-16

Family

ID=37086905

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005112598A Active JP4653545B2 (en) 2005-04-08 2005-04-08 Fluidized bed dryer and method for drying wet raw material by fluidized bed dryer

Country Status (8)

Country Link
JP (1) JP4653545B2 (en)
KR (1) KR100922258B1 (en)
CN (2) CN101156039B (en)
BR (1) BRPI0608616A2 (en)
RU (1) RU2352879C1 (en)
TW (1) TW200643357A (en)
UA (1) UA86318C2 (en)
WO (1) WO2006109626A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011214817A (en) * 2010-04-02 2011-10-27 Mitsubishi Heavy Ind Ltd Fluidized bed drying device and fluidized bed drying facility
JP2016183809A (en) * 2015-03-26 2016-10-20 住友重機械工業株式会社 Fluidized bed reactor
JP2020139715A (en) * 2019-03-01 2020-09-03 日本製鉄株式会社 Fluidized dryer

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101430294B1 (en) * 2011-11-11 2014-08-14 주식회사 케이티앤지 Cigarette filter using absorbents which are coated with natural extracts and method to manufacture the absorbents thereof
CN103968643B (en) * 2013-01-31 2016-07-06 江苏宇通干燥工程有限公司 Sucralose airpillow-dry and cooling system
CN104764297A (en) * 2014-07-22 2015-07-08 施荣芳 Dispersed feeding type pneumatic drier
CN107062803A (en) * 2017-03-09 2017-08-18 福建省环境工程有限公司 A kind of device for drying carbon black
CN113877477B (en) * 2021-10-26 2023-11-10 中国矿业大学 Coal slime granulating and drying equipment and working method

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62127388A (en) * 1985-11-27 1987-06-09 Nippon Kokan Kk <Nkk> Method for regulating moisture of coal or drying coal
JPH0759709B2 (en) * 1987-09-03 1995-06-28 三井鉱山株式会社 How to control the humidity of coal
JPH07114954B2 (en) * 1988-08-16 1995-12-13 エイ．アフルストロム コーポレーション Rapid fluidized bed reactor and its operating method
JP2938029B1 (en) * 1998-04-30 1999-08-23 川崎重工業株式会社 Method and apparatus for discharging particles from fluidized bed classifier
JP2001055582A (en) * 1999-08-18 2001-02-27 Nippon Steel Corp Process and device for drying coal
JP2002306944A (en) * 2001-04-12 2002-10-22 Okawara Mfg Co Ltd Granulation/drying process and fluidized bed granulation/drying equipment
JP2002309266A (en) * 2001-04-16 2002-10-23 Nippon Steel Corp Horizontal fluidized-bed drying/cooling method and apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6347596A (en) * 1986-08-11 1988-02-29 株式会社　テイエルブイ Measuring device for quantity of leakage of steam of steam trap
KR100883818B1 (en) * 2002-07-30 2009-02-16 주식회사 포스코 Coal dryer having device for preventing clogging of dust collecting vessel

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62127388A (en) * 1985-11-27 1987-06-09 Nippon Kokan Kk <Nkk> Method for regulating moisture of coal or drying coal
JPH0759709B2 (en) * 1987-09-03 1995-06-28 三井鉱山株式会社 How to control the humidity of coal
JPH07114954B2 (en) * 1988-08-16 1995-12-13 エイ．アフルストロム コーポレーション Rapid fluidized bed reactor and its operating method
JP2938029B1 (en) * 1998-04-30 1999-08-23 川崎重工業株式会社 Method and apparatus for discharging particles from fluidized bed classifier
JP2001055582A (en) * 1999-08-18 2001-02-27 Nippon Steel Corp Process and device for drying coal
JP2002306944A (en) * 2001-04-12 2002-10-22 Okawara Mfg Co Ltd Granulation/drying process and fluidized bed granulation/drying equipment
JP2002309266A (en) * 2001-04-16 2002-10-23 Nippon Steel Corp Horizontal fluidized-bed drying/cooling method and apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011214817A (en) * 2010-04-02 2011-10-27 Mitsubishi Heavy Ind Ltd Fluidized bed drying device and fluidized bed drying facility
JP2016183809A (en) * 2015-03-26 2016-10-20 住友重機械工業株式会社 Fluidized bed reactor
JP2020139715A (en) * 2019-03-01 2020-09-03 日本製鉄株式会社 Fluidized dryer
JP7260751B2 (en) 2019-03-01 2023-04-19 日本製鉄株式会社 Fluidized dryer

Also Published As

Publication number Publication date
JP4653545B2 (en) 2011-03-16
CN101156039B (en) 2010-05-26
CN101156039A (en) 2008-04-02
TW200643357A (en) 2006-12-16
CN101556104B (en) 2011-05-25
BRPI0608616A2 (en) 2010-01-19
TWI333049B (en) 2010-11-11
KR20080007240A (en) 2008-01-17
CN101556104A (en) 2009-10-14
KR100922258B1 (en) 2009-10-15
RU2352879C1 (en) 2009-04-20
WO2006109626A1 (en) 2006-10-19
UA86318C2 (en) 2009-04-10

Similar Documents

Publication Publication Date Title
JP2006292262A (en) Fluidized bed dryer, and drying method of wet raw material by fluidized bed dryer
JP5081288B2 (en) Fluidized bed dryer and method for drying wet raw material by fluidized bed dryer
KR100960429B1 (en) Method and apparatus for drying wet raw material
GB2508200A (en) Rotary slag granulator with air feed
US20120248664A1 (en) Arrangement for evening out powdery solid matter feed of a concentrate burner of a suspension smelting or suspension converting furnace
US3118658A (en) Apparatus for manufacturing a porous material such as blown clay, by heating
CN101312924B (en) Method and apparatus for treating lime mud
CN106905988A (en) A kind of coke dry quenching furnace with new exhaust structure
CA2778989C (en) Method and arrangement for feeding fuel into a circulating fluidized bed boiler
CN109520284A (en) A kind of five-part form magnesia unslacked energy conservation and environmental protection shaft furnace
CN201016551Y (en) Jiutian vertical drying machine
JP5977515B2 (en) Cooling unit and cooler device including the same
JP4598558B2 (en) Fluidized bed dryer and method for drying wet raw material by fluidized bed dryer
JP3290574B2 (en) Fluidized bed drying classifier and its operation method
CA1159254A (en) Shaft kiln
JP7260751B2 (en) Fluidized dryer
CN109539547B (en) Hot-blast stove using bran as fuel
CN101900484B (en) Fluidized calcining furnace
KR20120075167A (en) Device and method for drying coal for coke oven
CN110484718A (en) A kind of grate concurrent heating system and method for suitable iron ore concentrate production
SU1322058A1 (en) Apparatus for firing polydisperse material in fluidized bed
RU2485424C2 (en) Method for annealing of fine-grained material
KR20140134318A (en) Cement production device
WO2011158337A1 (en) Partial reduction furnace
JPS6140851A (en) Vertical burning furnace

Legal Events

Date Code Title Description
A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A712

Effective date: 20060804

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20060818

RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20060818

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20080313

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20100827

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20101025

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20101119

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20101217

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

Ref document number: 4653545

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20131224

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20131224

Year of fee payment: 3

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20131224

Year of fee payment: 3

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250